Usage examples (15)

• For instance, in the asci of lichens there are formed from a portion of the protoplasm four or more small ascospores, which secrete a cell-wall and lie loose in the ascus.
• They are set free by the rupture of the ascus, and germinate by putting out through their walls one or more filaments which branch and form the thallus of a new individual.
• In the latter species there are only two spores in an ascus.
• In this group, however, the spores are borne inside of club-shaped bodies, called sacs or asci (singular, ascus).